Brooks Men's Infiniti 2 Running Shoe 100% Mesh Hydroflow - fluid-filled centre chamber reduces the shock at impact and take off and dynam MOGO midsole - award winning midsole gives superior cushioning and reduces the shock felt P-DRB ( progressive diagonal rollbar) - dual density post is biomechanically engineered to DRB ACCEL - promotes natural movement between the heel and forefoot, This component utilis HPR PLUS - a higher durability, abrasion-resistant rubber outsole compound that wears long